A1322 New Laptop Battery for MacBook Pro 13" A1322 A1278 (Mid 2009,Mid 2010,Early 2011,Late 2011,Mid 2012);661-5229 020-6547-A 661-5557 MB990LL/A MB991LL/A MC374LL/A MC700LL/A --12 Months Warranty

Considering this is the cheapest battery on the market, I can't complain too bad. I bought it 4/20/2019 and stuck it in a 2011 late model macbook pro, and I am writing this 9/17/20; so 1 year and 5 months is how long it has lasted. I watch about 3-4 hours of youtube video's a day on average and at first it would last the whole day and maybe have 20% left. Now it will last one hour max watching youtube from 100% to 10% battery. I would rate the battery around 500 cycles till its bad, My macbook started dying randomly about 2 months ago (has done it maybe 5-10 times since then) with almost 20% left or so. Which tells me its not pushing enough volts (i think). Anyways upgrading to a $100 battery this time around because I expect to get at least 4-5 more years, who knows, maybe a lifetime out of this macbook pro. BATTERY GETS EXTREMELY HOT!!! which i know is not good. this starting happening just after about 8 months after buying it. Therefore, good temp, but if you can afford better, its probably better on the life of your macbook and just as cheap in the long run.

It looks and feels like OEM. They give you a manual but it's just warnings. There are no step by step instructions but you don't need them. It's simple. You unscrew the back unscrew 2 screws holding down the battery and unplug it and lifted out. Then stick in the replacement and button it all back up again. I made an instructional video but I couldn't load it to Amazon but it's on YouTube for your viewing pleasure. It came with 4 screwdrivers 2 phillips head and 2 torx heads. Even though they are cheap it's nice to have them included.The battery came charged at 76% so it charged up to 100% in no time. Charging from low like 5% takes about the same time as OEM. Discharging the battery however is different. Works normally to under 50% then from anywhere in the 40% to 30% it will drop suddenly to below 7% instantly. I haven't seen any readings in the 20s or teens. Seems to have a problem giving proper readings below 50%. No warping does not get as hot and seems to work but the capacity may be lower than indicated. IDK.Update: Great customer service. They heard about my issue and sent me a replacement.

honestly when i first received it didn’t work at all. i was going to return it but then a few days later (before i got a chance to remove it) it started working. then everything was fine for a few months then the battery life dramatically shortened over the course of the year. then my trackpad started bulging up and i hadn’t realized it was the battery that was swelling. finally i left on a trip and came back to find the trackpad was cracked and bulging out quite significantly. finally came to realize it was the battery. so i removed it and got the trackpad mostly back to normal (still cracked, bulging out much less). all in all. not a good buy.UPDATE October 2019The seller reached out to me and they kindly replaced the battery, after my previous review. they said my previous battery was "not our standard level and may be defective." the new battery i received hasn't given me any issues. granted i've only had the battery for a couple weeks. i'm updating from 1 star to 3 because of their customer service.

The battery isnt a certified apple product which I discovered after both makes your mac book unable to properly recognize it, as well as invalidating your warranty if you install it. (Didnt matter for mine, it was past warranty anyways)But after a couple weeks (9 charge cycles) it wont work unless my computer is plugged in.*addendum* they contacted me and offered an apology as well as a refund. Hopefully the issue was only in the one I received and the rest of their batteries are solid. They have a 1 year warranty, and overall I can't complain with their quick response and correction to my issue. Thanks guys! Good luck in your business!

This seemed like a good deal, but the first battery I was sent bulged inside my computer whenever charged such that it affected the track pad (wouldn't click, inconsistent responsiveness). When I asked about it, I was told to send it back for a replacement, which was delivered fairly promptly. The new one seemed to work just fine with a noticeably longer battery life once calibrated.I'd say this is a decent enough battery for the money, even if you might need to spend a bit of extra time making sure you receive a properly working one. They were easy enough to deal with if you do have any initial issues.

Everything about this is great. The battery arrived earlier than expected and the quality appears good enough. The problem is the included tools. Only the phillips head is needed, of the 4, and it stripped on a tight fitting screw. The screw was tight due to pressure exerted on the case from the original bloated battery. Then the battery is held internally with two different sized screws that have an odd star shape. None of the 4 screwdrivers worked for those.So, the 4 stars are due to the cheapo screwdriver that stripped and the other 3 not needed screwdrivers.

Edited:After using this battery for five months, it began to swell, making the touchpad inoperable. I contacted the seller WENYAA and was pleasantly surprised how quickly they responded. I returned the swollen battery using a pre-paid USPS sticker emailed to me. In less than one week, I had a new battery in the mailbox.WENYAA was super about making this right. They stood behind their warranty. Fantastic customer service. Thanks WENYAA for taking care of the problem without any hassle. I have purchased this battery for both mine and my wife’s MacBook Pro. I would not hesitate to purchase again.This battery was easy to install and fit perfectly. Conditioned the battery by completely discharging then charging. I get 5 hours of computer time per charge. Great product!